aux/listen: remove Service struct
An announcing process already knows what port it announced on, we don't need to derive it from every connection.
This commit is contained in:
Jacob Moody
parent
1da69597bd
commit
8fbfba1ecf
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@ -2,14 +2,9 @@
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#include <libc.h>
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#include <auth.h>
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#define NAMELEN 64 /* reasonable upper limit for name elements */
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typedef struct Service Service;
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struct Service
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{
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char serv[NAMELEN]; /* name of the service */
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char remote[3*NAMELEN]; /* address of remote system */
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char prog[5*NAMELEN+1]; /* program to execute */
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enum{
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Maxpath = 1024,
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Maxserv = 64,
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};
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typedef struct Announce Announce;
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@ -24,9 +19,7 @@ struct Announce
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int readstr(char*, char*, char*, int);
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void dolisten(char*, int, char*, char*, long*);
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void newcall(int, char*, Service*);
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int findserv(char*, Service*, char*);
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int getserv(char*, Service*);
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void newcall(int, char*, char*, char*);
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void error(char*);
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void scandir(char*);
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void becomenone(void);
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@ -42,7 +35,6 @@ char *proto;
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char *protodir;
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char *addr;
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Announce *announcements;
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#define SEC 1000
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char *namespace;
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@ -56,7 +48,6 @@ usage(void)
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void
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main(int argc, char *argv[])
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{
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Service *s;
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char *trustdir;
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char *servdir;
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@ -102,9 +93,9 @@ main(int argc, char *argv[])
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if(!servdir && !trustdir)
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servdir = "/bin/service";
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if(servdir && strlen(servdir) + NAMELEN >= sizeof(s->prog))
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if(servdir && strlen(servdir) + Maxserv >= Maxpath)
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error("service directory too long");
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if(trustdir && strlen(trustdir) + NAMELEN >= sizeof(s->prog))
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if(trustdir && strlen(trustdir) + Maxserv >= Maxpath)
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error("trusted service directory too long");
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switch(argc){
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@ -186,8 +177,7 @@ listendir(char *srvdir, int trusted)
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sleep((pid*10)%200);
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/* copy to stack */
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strncpy(ds, a->a, sizeof(ds));
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snprint(ds, sizeof ds, "%s!%s!%s", protodir, addr, a->a);
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whined = a->whined;
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/* a process per service */
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@ -211,7 +201,7 @@ listendir(char *srvdir, int trusted)
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else
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exits("ctl");
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}
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dolisten(dir, ctl, srvdir, ds, &childs);
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dolisten(dir, ctl, srvdir, a->a, &childs);
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close(ctl);
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}
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default:
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@ -290,7 +280,6 @@ scandir(char *dname)
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Announce *a, **l;
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int fd, i, n, nlen;
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char *nm;
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char ds[128];
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Dir *db;
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for(a = announcements; a != nil; a = a->next)
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@ -310,8 +299,7 @@ scandir(char *dname)
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continue;
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if(strncmp(nm, proto, nlen) != 0)
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continue;
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snprint(ds, sizeof ds, "%s!%s!%s", protodir, addr, nm + nlen);
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addannounce(ds);
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addannounce(nm + nlen);
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}
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free(db);
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}
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@ -341,14 +329,16 @@ becomenone(void)
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}
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void
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dolisten(char *dir, int ctl, char *srvdir, char *dialstr, long *pchilds)
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dolisten(char *dir, int ctl, char *srvdir, char *port, long *pchilds)
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{
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Service s;
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char ndir[40], wbuf[64];
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char prog[Maxpath], serv[Maxserv];
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int nctl, data, wfd, nowait;
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procsetname("%s %s", dir, dialstr);
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procsetname("%s %s!%s!%s", dir, proto, addr, port);
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snprint(serv, sizeof serv, "%s%s", proto, port);
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snprint(prog, sizeof prog, "%s/%s", srvdir, serv);
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wfd = -1;
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nowait = RFNOWAIT;
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if(pchilds && maxprocs > 0){
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@ -413,17 +403,6 @@ dolisten(char *dir, int ctl, char *srvdir, char *dialstr, long *pchilds)
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close(nctl);
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continue;
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case 0:
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/*
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* see if we know the service requested
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*/
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memset(&s, 0, sizeof s);
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if(!findserv(ndir, &s, srvdir)){
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if(!quiet)
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syslog(1, listenlog, "%s: unknown service '%s' from '%s': %r",
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proto, s.serv, s.remote);
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reject(nctl, ndir, "connection refused");
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exits(0);
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}
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data = accept(nctl, ndir);
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if(data < 0){
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syslog(1, listenlog, "can't open %s/data: %r", ndir);
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@ -434,7 +413,7 @@ dolisten(char *dir, int ctl, char *srvdir, char *dialstr, long *pchilds)
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close(nctl);
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if(wfd >= 0)
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close(wfd);
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newcall(data, ndir, &s);
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newcall(data, ndir, prog, serv);
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exits(0);
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default:
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close(nctl);
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@ -447,61 +426,19 @@ dolisten(char *dir, int ctl, char *srvdir, char *dialstr, long *pchilds)
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}
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}
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/*
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* look in the service directory for the service.
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* if the shell script or program is zero-length, ignore it,
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* thus providing a way to disable a service with a bind.
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*/
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int
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findserv(char *dir, Service *s, char *srvdir)
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{
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int rv;
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Dir *d;
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if(!getserv(dir, s))
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return 0;
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snprint(s->prog, sizeof s->prog, "%s/%s", srvdir, s->serv);
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d = dirstat(s->prog);
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rv = d && d->length > 0; /* ignore unless it's non-empty */
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free(d);
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return rv;
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}
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/*
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* get the service name out of the local address
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*/
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int
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getserv(char *dir, Service *s)
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{
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char addr[128], *serv, *p;
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long n;
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readstr(dir, "remote", s->remote, sizeof(s->remote)-1);
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if(p = utfrune(s->remote, '\n'))
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*p = '\0';
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if(p = utfrune(s->remote, '!'))
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*p = '\0';
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n = readstr(dir, "local", addr, sizeof(addr)-1);
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if(n <= 0)
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return 0;
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if(p = utfrune(addr, '\n'))
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*p = '\0';
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serv = utfrune(addr, '!');
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if(!serv)
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return 0;
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snprint(s->serv, sizeof s->serv, "%s%s", proto, serv+1);
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return 1;
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}
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void
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newcall(int fd, char *dir, Service *s)
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newcall(int fd, char *dir, char *prog, char *serv)
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{
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char data[4*NAMELEN];
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char data[Maxpath];
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char remote[128];
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char *p;
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if(!quiet)
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syslog(0, listenlog, "%s call for %s on chan %s (%s)", proto, s->serv, dir, s->remote);
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if(!quiet){
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readstr(dir, "remote", remote, sizeof remote);
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if(p = utfrune(remote, '!'))
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*p = '\0';
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syslog(0, listenlog, "%s call for %s on chan %s (%s)", proto, serv, dir, remote);
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}
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snprint(data, sizeof data, "%s/data", dir);
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bind(data, "/dev/cons", MREPL);
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@ -515,8 +452,8 @@ newcall(int fd, char *dir, Service *s)
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*/
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for(fd=3; fd<20; fd++)
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close(fd);
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execl(s->prog, s->prog, s->serv, proto, dir, nil);
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error(s->prog);
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execl(prog, prog, serv, proto, dir, nil);
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error(prog);
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}
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void
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@ -533,7 +470,7 @@ int
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readstr(char *dir, char *info, char *s, int len)
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{
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int n, fd;
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char buf[3*NAMELEN+4];
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char buf[Maxpath];
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snprint(buf, sizeof buf, "%s/%s", dir, info);
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fd = open(buf, OREAD);
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